Continuous metal joist-support



(No Model.)

W. H. DRAKE. OOOOOOOOOOOOOOOOO IST SUPPORT.

- No. 526,302. PatentedSept.'18,1894.,

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UNITED STATES WILLIAM IIpDRAIiE, OF CHICAGO, ILLINOIS.

I PATENT O FICE.

CONTINUOUS METAL JOlST-SUPPORT.

SPECIFICATION forming part of Letters Patent No. 526,302, datedSeptember 18, 1894.

Application filed July 2, 1894. serial No. 516,315. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM H. DRAKE, a cltizen of the United States,and a resident of Ch cago, county of Cook, and State of Illinois, haveinvented new and useful Improvements in Continuous MetalJoist-Supports,of whlch the following is a specification, referencebeing had to the annexed drawings, making a part hereof, in which-Figure l, is a perspective representation of a portion of a brick wall,my improved supports connected therewith and joists thereon; Fig. 2, amodification in the construction in end elevation; Fig. 3, a plan viewof Fig. 2; Fig. 4:, an end elevation showing how one continuous supportis secured to a'wall.

This invention relates to an improvement 1n metal joist supports bywhich the joists have their bearing wholly between the walls. It hasbeen the custom to employ metal seats which are inserted in the wallsand the ends of the joists inserted in the seats, but a seriousobjection to their use is the seats Weaken the wall more than thejoistwithout the seats, for the seats require about double the space wherebyon a two-brick wall, when the seats are employed it has but narrow andpoorly constructed piers standing between the metal seats. Any wall isweakened by the projection of joists into it; and observation provesthat joists commence first to decay at their ends within the walls. Afurther objection to the use of seats and supporting joists within thewall is the difficulty in obtaining uniform level seats; and there is aspecial objection to inserting joists in partition walls, in that firefrom one building follows the joists through to the other building. Iremedy all these 0bjections by what I term Z-plates, which are ofwrought iron and of such lengths as are convenient to be formed in amill, and suitable for the building. One portion of the Z- plate E, isformed to lie levelon one width of brick in the wall. Its connectingplate F extends down on the inner face of the wall about two thicknessesof brick, and then turns inward at G at right angles to the plate F, andhas an extension of about four inches from the wall A, and terminates ina square cornered bar H, which in practice is a half inch to an inchhighaccording to size of the building and tying strength required. The

joists are at M notched onto the bar H so that their inner ends willcome to the plate F and their lower edges will bear on the plate G.Where but one Z-plate is employed on a wall, an anchor L, K, N is placedover the flange J and down onto the brick A as shown at Fig. 4, but whentwo Z-plates are employed, as at Fig. 1, a suitable number ofanchor-clamps O are placed over the flanges J, convenient forsupporting'the ends of the Z-plates. In line are the bars H in one ormore pieces breaking joints with the sections of Z-plates and secured tothe bars to the plates by nuts and bolts as shown in Figs. 2, 3, andt,or rivets as shown at n, u, but preferably the bars H, and the Z-platesE, F, G, are to be formed of a single piece of metal by the ordinaryrolling process, as shown at H, at the left of Fig. 1. In case the woodwork of abuilding be burned out new joists can be set in place withoutinterfering with the walls. The top portion E of the Z-plates may berolled not to exceed three-eighths of an inch thick for a three or fourstory building. .The plates F may be a half inch thick, and five-eighthsof an inch in thickness will be sufficient for the supports G, theangles between the plates F and G being somewhat thicker. The spacebetween the under side of support G and the under side of the joists C,D, will be taken up by the furring secured to the joist, whereby thelath will run parallel with the joists and extend to the wall A.

B, is also a brick wall, and is simply an extension of wall A from thetops of plate E, E. Having thus described my invention, I claim and,desire to secure by Letters Patent A continuous joist support formed ofone or more sections of metal and consisting of a plate projecting intothe wall and anchored substantially as shown, a vertical plate portionextending down out on the inner face of the wall, and a supportingportion extending at right angles to pendent portion and provided with arigid square angled bar, and a recess between the bar and the pendentportion; as and for the purpose specified. WILLIAM H. DRAKE.

Witnesses:

G. L. OHAPIN,

S. M. OLOANE.

